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annotate src/luan/LuanTable.java @ 781:fbbdd369a13a

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rename DeepCloner to LuanCloner
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 29 Aug 2016 22:49:32 -0600
parents 1a68fc55a80c
children 655280eab1e2
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1 package luan;
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2
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3 import java.util.Iterator;
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4 import java.util.ListIterator;
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5 import java.util.Map;
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6 import java.util.AbstractMap;
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7 import java.util.LinkedHashMap;
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8 import java.util.List;
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9 import java.util.ArrayList;
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10 import java.util.Collections;
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11 import java.util.Comparator;
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12 import java.util.Set;
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13 import java.util.HashSet;
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2df768b926aa start Luan
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15
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16 public final class LuanTable implements LuanCloneable {
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17 private Map map = null;
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18 private List list = null;
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19 private LuanTable metatable = null;
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20 public LuanJava java;
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21
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22 public LuanTable() {}
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23
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24 public LuanTable(List list) {
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25 int n = list.size();
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26 for( int i=0; i<n; i++ ) {
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27 Object val = list.get(i);
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28 if( val != null )
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29 rawPut(i+1,val);
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30 }
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31 }
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32
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33 public LuanTable(Map map) {
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34 for( Object stupid : map.entrySet() ) {
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35 Map.Entry entry = (Map.Entry)stupid;
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36 Object key = entry.getKey();
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37 Object value = entry.getValue();
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38 if( key != null && value != null )
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39 rawPut(key,value);
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40 }
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41 }
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42
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43 public LuanTable(Set set) {
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44 for( Object el : set ) {
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45 if( el != null )
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46 rawPut(el,Boolean.TRUE);
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47 }
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48 }
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50 public LuanTable(LuanTable tbl) {
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51 if( tbl.map != null && !tbl.map.isEmpty() )
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52 this.map = new LinkedHashMap<Object,Object>(tbl.map);
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53 if( tbl.rawLength() > 0 )
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54 this.list = new ArrayList<Object>(tbl.list);
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55 this.metatable = tbl.metatable;
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56 }
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57
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58 @Override public LuanTable shallowClone() {
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59 return new LuanTable();
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60 }
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61
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62 @Override public void deepenClone(LuanCloneable dc,LuanCloner cloner) {
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63 LuanTable clone = (LuanTable)dc;
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64 if( map != null ) {
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65 clone.map = newMap();
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66 for( Object stupid : map.entrySet() ) {
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67 Map.Entry entry = (Map.Entry)stupid;
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68 clone.map.put( cloner.get(entry.getKey()), cloner.get(entry.getValue()) );
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69 }
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70 }
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71 if( list != null ) {
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72 clone.list = new ArrayList<Object>();
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73 for( Object obj : list ) {
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74 clone.list.add( cloner.get(obj) );
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75 }
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76 }
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77 if( metatable != null )
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78 clone.metatable = (LuanTable)cloner.get(metatable);
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79 clone.java = (LuanJava)cloner.deepClone(java);
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80 }
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81
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82 public boolean isList() {
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83 return map==null || map.isEmpty();
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84 }
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85
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86 public List<Object> asList() {
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87 return list!=null ? list : Collections.emptyList();
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88 }
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89
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90 public String toString(LuanState luan) throws LuanException {
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91 Object h = getHandler("__to_string");
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92 if( h == null )
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93 return rawToString();
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94 if( h instanceof LuanMeta ) {
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95 LuanMeta meta = (LuanMeta)h;
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96 return meta.__to_string(luan,this);
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97 }
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98 LuanFunction fn = Luan.checkFunction(h);
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99 return Luan.checkString( Luan.first( fn.call(luan,new Object[]{this}) ) );
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100 }
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101
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102 public String rawToString() {
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103 return "table: " + Integer.toHexString(hashCode());
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104 }
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105
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106 public Object get(LuanState luan,Object key) throws LuanException {
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107 Object value = rawGet(key);
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108 if( value != null )
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109 return value;
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110 Object h = getHandler("__index");
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111 if( h==null )
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112 return null;
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113 if( h instanceof LuanFunction ) {
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114 LuanFunction fn = (LuanFunction)h;
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115 return Luan.first(fn.call(luan,new Object[]{this,key}));
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116 }
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117 if( h instanceof LuanMeta ) {
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118 LuanMeta meta = (LuanMeta)h;
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119 return meta.__index(luan,this,key);
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120 }
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121 return luan.index(h,key);
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122 }
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123
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124 public Object rawGet(Object key) {
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125 if( list != null ) {
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126 Integer iT = Luan.asInteger(key);
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127 if( iT != null ) {
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128 int i = iT - 1;
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129 if( i>=0 && i<list.size() )
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130 return list.get(i);
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131 }
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132 }
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133 if( map==null )
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134 return null;
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135 if( key instanceof Number && !(key instanceof Double) ) {
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136 Number n = (Number)key;
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137 key = Double.valueOf(n.doubleValue());
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138 }
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139 return map.get(key);
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140 }
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141
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142 public void put(LuanState luan,Object key,Object value) throws LuanException {
428
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143 Object h = getHandler("__new_index");
427
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144 if( h==null || rawGet(key)!=null ) {
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145 rawPut(key,value);
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146 return;
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147 }
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148 if( h instanceof LuanFunction ) {
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149 LuanFunction fn = (LuanFunction)h;
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150 fn.call(luan,new Object[]{this,key,value});
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151 return;
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152 }
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153 if( h instanceof LuanMeta ) {
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154 LuanMeta meta = (LuanMeta)h;
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155 meta.__new_index(luan,this,key,value);
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156 return;
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157 }
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158 if( h instanceof LuanTable ) {
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159 LuanTable tbl = (LuanTable)h;
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160 tbl.put(luan,key,value);
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161 return;
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162 }
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163 throw new LuanException("invalid type "+Luan.type(h)+" for metamethod __new_index");
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164 }
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165
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166 public void rawPut(Object key,Object val) {
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167 Integer iT = Luan.asInteger(key);
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168 if( iT != null ) {
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169 int i = iT - 1;
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170 if( list != null || i == 0 ) {
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171 if( i == list().size() ) {
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172 if( val != null ) {
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173 list.add(val);
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174 mapToList();
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175 }
224
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176 return;
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177 } else if( i>=0 && i<list.size() ) {
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178 list.set(i,val);
118
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179 if( val == null ) {
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180 listToMap(i);
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181 }
224
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182 return;
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183 }
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184 }
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185 }
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186 if( map==null )
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187 map = newMap();
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188 if( key instanceof Number && !(key instanceof Double) ) {
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189 Number n = (Number)key;
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190 key = Double.valueOf(n.doubleValue());
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191 }
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192 if( val == null ) {
224
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193 map.remove(key);
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194 } else {
224
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195 map.put(key,val);
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196 }
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197 }
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198
47
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199 private void mapToList() {
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200 if( map != null ) {
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201 while(true) {
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202 Object v = map.remove(Double.valueOf(list.size()+1));
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203 if( v == null )
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204 break;
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205 list.add(v);
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206 }
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207 }
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208 }
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diff changeset
209
118
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210 private void listToMap(int from) {
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211 if( list != null ) {
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212 while( list.size() > from ) {
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213 int i = list.size() - 1;
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214 Object v = list.remove(i);
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215 if( v != null ) {
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216 if( map==null )
284
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217 map = newMap();
118
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218 map.put(i+1,v);
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219 }
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220 }
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221 }
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222 }
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223
47
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224 private List<Object> list() {
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225 if( list == null ) {
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226 list = new ArrayList<Object>();
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227 mapToList();
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228 }
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229 return list;
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230 }
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231
431
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diff changeset
232 public void rawInsert(int pos,Object value) {
108
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233 if( value==null )
222
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diff changeset
234 throw new IllegalArgumentException("can't insert a nil value");
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235 list().add(pos-1,value);
108
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236 mapToList();
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237 }
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238
431
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diff changeset
239 public Object rawRemove(int pos) {
47
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240 return list().remove(pos-1);
44
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241 }
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242
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243 public void rawSort(Comparator<Object> cmp) {
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244 Collections.sort(list(),cmp);
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245 }
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246
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247 public int length(LuanState luan) throws LuanException {
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248 Object h = getHandler("__len");
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249 if( h != null ) {
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250 LuanFunction fn = Luan.checkFunction(h);
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251 return (Integer)Luan.first(fn.call(luan,new Object[]{this}));
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252 }
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253 return rawLength();
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254 }
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255
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256 public int rawLength() {
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257 return list==null ? 0 : list.size();
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258 }
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259
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260 public Iterable<Map.Entry<Object,Object>> iterable(LuanState luan) throws LuanException {
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261 final Iterator<Map.Entry<Object,Object>> iter = iterator(luan);
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262 return new Iterable<Map.Entry<Object,Object>>() {
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263 public Iterator<Map.Entry<Object,Object>> iterator() {
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264 return iter;
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265 }
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266 };
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267 }
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268
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269 public Iterable<Map.Entry<Object,Object>> rawIterable() throws LuanException {
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270 final Iterator<Map.Entry<Object,Object>> iter = rawIterator();
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271 return new Iterable<Map.Entry<Object,Object>>() {
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272 public Iterator<Map.Entry<Object,Object>> iterator() {
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273 return iter;
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274 }
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275 };
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276 }
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277
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278 public Iterator<Map.Entry<Object,Object>> iterator(final LuanState luan) throws LuanException {
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279 if( getHandler("__pairs") == null )
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280 return rawIterator();
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281 final LuanFunction fn = pairs(luan);
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282 return new Iterator<Map.Entry<Object,Object>>() {
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283 private Map.Entry<Object,Object> next = getNext();
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284
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285 private Map.Entry<Object,Object> getNext() {
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286 try {
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287 Object obj = fn.call(luan);
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288 if( obj==null )
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289 return null;
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290 Object[] a = (Object[])obj;
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291 if( a.length == 0 || a[0]==null )
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292 return null;
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293 return new AbstractMap.SimpleEntry<Object,Object>(a[0],a[1]);
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294 } catch(LuanException e) {
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295 throw new LuanRuntimeException(e);
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296 }
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297 }
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298
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299 public boolean hasNext() {
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300 return next != null;
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301 }
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302
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303 public Map.Entry<Object,Object> next() {
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304 Map.Entry<Object,Object> rtn = next;
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305 next = getNext();
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306 return rtn;
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307 }
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308
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309 public void remove() {
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310 throw new UnsupportedOperationException();
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311 }
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312 };
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313 }
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314
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315 public LuanFunction pairs(LuanState luan) throws LuanException {
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316 Object h = getHandler("__pairs");
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317 if( h != null ) {
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318 if( h instanceof LuanFunction ) {
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319 LuanFunction fn = (LuanFunction)h;
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320 Object obj = Luan.first(fn.call(luan,new Object[]{this}));
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321 if( !(obj instanceof LuanFunction) )
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322 throw new LuanException( "metamethod __pairs should return function but returned " + Luan.type(obj) );
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323 return (LuanFunction)obj;
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324 }
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325 if( h instanceof LuanMeta ) {
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326 LuanMeta meta = (LuanMeta)h;
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327 return meta.__pairs(luan,this);
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328 }
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329 throw new LuanException( "invalid type of metamethod __pairs: " + Luan.type(h) );
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330 }
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331 return rawPairs();
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332 }
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333
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334 private LuanFunction rawPairs() {
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335 return new LuanFunction() {
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336 final Iterator<Map.Entry<Object,Object>> iter = rawIterator();
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337
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338 @Override public Object[] call(LuanState luan,Object[] args) {
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339 if( !iter.hasNext() )
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340 return LuanFunction.NOTHING;
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341 Map.Entry<Object,Object> entry = iter.next();
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342 return new Object[]{entry.getKey(),entry.getValue()};
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343 }
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344 };
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345 }
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346
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347 public Iterator<Map.Entry<Object,Object>> rawIterator() {
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348 if( list == null ) {
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349 if( map == null )
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350 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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351 return map.entrySet().iterator();
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352 }
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353 if( map == null )
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354 return listIterator();
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355 return new Iterator<Map.Entry<Object,Object>>() {
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356 Iterator<Map.Entry<Object,Object>> iter = listIterator();
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357 boolean isList = true;
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358
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359 public boolean hasNext() {
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360 boolean b = iter.hasNext();
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361 if( !b && isList ) {
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362 iter = map.entrySet().iterator();
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363 isList = false;
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364 b = iter.hasNext();
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365 }
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366 return b;
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367 }
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368
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369 public Map.Entry<Object,Object> next() {
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370 return iter.next();
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371 }
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372
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373 public void remove() {
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374 throw new UnsupportedOperationException();
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375 }
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376 };
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377 }
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378
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379 private Iterator<Map.Entry<Object,Object>> listIterator() {
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380 if( list == null )
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381 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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382 final ListIterator iter = list.listIterator();
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383 return new Iterator<Map.Entry<Object,Object>>() {
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384
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385 public boolean hasNext() {
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386 return iter.hasNext();
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387 }
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388
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389 public Map.Entry<Object,Object> next() {
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390 Integer key = iter.nextIndex()+1;
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391 return new AbstractMap.SimpleEntry<Object,Object>(key,iter.next());
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392 }
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393
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394 public void remove() {
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395 throw new UnsupportedOperationException();
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396 }
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397 };
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398 }
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399
431
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400 public LuanTable rawSubList(int from,int to) {
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401 LuanTable tbl = shallowClone();
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402 tbl.list = new ArrayList<Object>(list().subList(from-1,to-1));
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403 return tbl;
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404 }
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405
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406 public LuanTable getMetatable() {
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407 return metatable;
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408 }
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409
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410 public void setMetatable(LuanTable metatable) {
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411 this.metatable = metatable;
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412 }
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413
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414 public Object getHandler(String op) {
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415 return metatable==null ? null : metatable.rawGet(op);
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416 }
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417
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418 private Map<Object,Object> newMap() {
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419 return new LinkedHashMap<Object,Object>();
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420 }
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421
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422 public boolean isSet(LuanState luan) throws LuanException {
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423 for( Map.Entry<Object,Object> entry : iterable(luan) ) {
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424 if( !entry.getValue().equals(Boolean.TRUE) )
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425 return false;
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426 }
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427 return true;
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428 }
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429
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430 public Set<Object> asSet(LuanState luan) throws LuanException {
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431 Set<Object> set = new HashSet<Object>();
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432 for( Map.Entry<Object,Object> entry : iterable(luan) ) {
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433 set.add(entry.getKey());
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434 }
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435 return set;
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436 }
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437
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438 public Map<Object,Object> asMap(LuanState luan) throws LuanException {
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439 Map<Object,Object> map = newMap();
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440 for( Map.Entry<Object,Object> entry : iterable(luan) ) {
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441 map.put(entry.getKey(),entry.getValue());
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442 }
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443 return map;
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444 }
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445
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446 public void rawClear() {
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447 map = null;
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448 list = null;
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449 }
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450
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451 }